Effects of litter leaves of Populus tomentosa Carr. on seed germination and phenotypic plasticity of Aegilops tauschii Coss.

doi:10.3969/j.issn.1004-1524.2023.03.14

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (3): 615-623.DOI: 10.3969/j.issn.1004-1524.2023.03.14

• Plant Protection • Previous Articles Next Articles

Effects of litter leaves of Populus tomentosa Carr. on seed germination and phenotypic plasticity of Aegilops tauschii Coss.

CHEN Hao(), ZHANG Yuewei, WANG Ning, WANG Zi, CHANG Qingshan

College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang 471000, Henan, China

Received:2022-04-21 Online:2023-03-25 Published:2023-04-07

Abstract

Abstract:

The aim of this study was to investigate the allelopathic effects of leaf litter extraction and litter decomposition of Populus tomentosa Carr. on seeds and seedings of Aegilops tauschii Coss. Seeds and seedlings of A.tauschi were used as materials in the experiment, and the dish method and pot method were used respectively. The results showed that the regulation of allelopathic substances of P. tomentosa Carr. litters had a concentration effect. The concentration aqueous extract of P. tomentosa Carr. promoted germination at low concentration (5 mg·mL^-1) and significantly (P<0.05) inhibited it at high concentration (40, 60 mg·mL^-1). The biomass accumulation and total leaf area were significantly (P<0.05) increased with low leaf litter addition (30 g) of P. tomentosa Carr. to the soil, while in the treatment of high addition (120 g), biomass accumulation, total leaf area, mean leaf area, leaf area ratio, leaf area root mass ratio and relative growth rate were significantly inhibited. The leaves of P. tomentosa Carr. had an allelopathic effect on A. tauschii Coss, high concentrations of allelochemicals in the fallen leaves of P. tomentosa Carr. significantly inhibit seed germination and plant growth of A. tauschii Coss. On the other hand, A. tauschii Coss. showed high phenotypic plasticity in adapting to the environment of fallen leaves of P. tomentosa Carr, leaf had the highest phenotypic plasticity among all plant components, phenotypic plasticity index of total leaf area, leaf biomass, leaf biomass allocation were 0.81, 0.78 and 0.34, respectively.

Key words: Aegilops tauschii Coss., Populus tomentosa Carr., allelopathy, phenotypic plasticity

CLC Number:

S451

CHEN Hao, ZHANG Yuewei, WANG Ning, WANG Zi, CHANG Qingshan. Effects of litter leaves of Populus tomentosa Carr. on seed germination and phenotypic plasticity of Aegilops tauschii Coss.[J]. Acta Agriculturae Zhejiangensis, 2023, 35(3): 615-623.

Figures/Tables 7

References 33

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浸提液浓度 Leachate concentrations/(mg·mL^-1)	发芽率 Germination rate/%	发芽势 Germination energy/%	发芽指数 Germination index	平均发芽时间 Mean germination time/d
0	60.67±4.67 a	37.33±1.33 ab	9.27±0.49 ab	4.27±0.10 ab
5	64.67±4.37 a	47.33±1.33 a	10.45±0.06 a	3.67±0.30 b
10	58.67±1.33 a	35.33±5.33 ab	8.34±0.67 ab	4.75±0.39 a
20	55.33±2.91 ab	30.67±4.67 bc	7.34±0.77 b	4.63±0.27 ab
40	44.00±6.11 bc	18.67±3.93 cd	5.12±1.15 c	5.33±0.51 a
60	33.33±4.81 c	17.33±1.33 d	4.05±0.51 c	4.61±0.11 ab

浸提液浓度 Leachate concentrations/(mg·mL^-1)	发芽率 Germination rate/%	发芽势 Germination energy/%	发芽指数 Germination index	平均发芽时间 Mean germination time/d
0	60.67±4.67 a	37.33±1.33 ab	9.27±0.49 ab	4.27±0.10 ab
5	64.67±4.37 a	47.33±1.33 a	10.45±0.06 a	3.67±0.30 b
10	58.67±1.33 a	35.33±5.33 ab	8.34±0.67 ab	4.75±0.39 a
20	55.33±2.91 ab	30.67±4.67 bc	7.34±0.77 b	4.63±0.27 ab
40	44.00±6.11 bc	18.67±3.93 cd	5.12±1.15 c	5.33±0.51 a
60	33.33±4.81 c	17.33±1.33 d	4.05±0.51 c	4.61±0.11 ab

处理 Treatments	生物量Biomass
处理 Treatments	叶Leaf	根Root	茎Stem	地上部Aboveground	总Total
CK	0.255±0.013 b	0.095±0.005 b	0.789±0.025 ab	1.044±0.035 b	1.139±0.040 b
Y30	0.384±0.023 a	0.141±0.008 a	1.024±0.148 a	1.408±0.157 a	1.549±0.161 a
Y60	0.223±0.007 b	0.116±0.006 b	0.728±0.037 b	0.951±0.038 b	1.067±0.042 b
Y120	0.085±0.012 c	0.059±0.012 c	0.393±0.066 c	0.478±0.072 c	0.537±0.082 c

处理 Treatments	生物量Biomass
处理 Treatments	叶Leaf	根Root	茎Stem	地上部Aboveground	总Total
CK	0.255±0.013 b	0.095±0.005 b	0.789±0.025 ab	1.044±0.035 b	1.139±0.040 b
Y30	0.384±0.023 a	0.141±0.008 a	1.024±0.148 a	1.408±0.157 a	1.549±0.161 a
Y60	0.223±0.007 b	0.116±0.006 b	0.728±0.037 b	0.951±0.038 b	1.067±0.042 b
Y120	0.085±0.012 c	0.059±0.012 c	0.393±0.066 c	0.478±0.072 c	0.537±0.082 c

处理 Treatments	生物量比Biomass allocation/%			叶重分数 Leaf mass fraction/(g·g^-1)	根冠比 Root to shoot ratio
处理 Treatments	叶Leaf	根Root	茎Stem	叶重分数 Leaf mass fraction/(g·g^-1)	根冠比 Root to shoot ratio
CK	22.33±0.71 a	8.33±0.27 b	69.34±0.63 a	0.244±0.007 ab	0.091±0.003 b
Y30	25.47±2.14 a	9.38±0.83 ab	65.15±2.93 a	0.282±0.026 a	0.104±0.011 ab
Y60	21.02±0.92 ab	10.90±0.28 a	68.08±0.84 a	0.236±0.012 ab	0.122±0.004 a
Y120	16.79±2.14 b	10.75±0.89 a	72.46±2.40 a	0.188±0.024 b	0.121±0.011 a

Effects of litter leaves of Populus tomentosa Carr. on seed germination and phenotypic plasticity of Aegilops tauschii Coss.

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处理 Treatments	总叶面积 Total leaf area/cm²	平均叶面积 Mean leaf area/cm²	叶面积比 Leaf area ratio/(cm²·g^-1)	比叶面积 Specific leaf area/(cm²·g^-1)	叶根比 Leaf area root mass ratio/(cm²·g^-1)
CK	42.90±2.801 b	3.34±0.18 a	37.81±2.663 a	168.90±9.01 a	459.70±46.20 a
Y30	57.30±4.347 a	3.36±0.14 a	42.75±4.126 a	167.40±5.10 a	456.40±22.10 a
Y60	35.39±3.845 b	2.70±0.27 b	33.75±4.604 ab	158.50±16.85 a	313.40±48.90 b
Y120	12.06±1.416 c	1.66±0.14 c	23.44±1.987 b	142.90±6.81 b	223.60±24.65 b

处理 Treatments	平均相对生长速率 Relative growth rate/(g·g^-1·d^-1)	净同化速率 Net assimilation rate/(g·m^-2·d^-1)	平均叶面积比 Average leaf area ratio/(m²·kg^-1)
CK	0.060±0.001 ab	9.881±0.516 a	6.158±0.267 a
Y30	0.068±0.003 a	10.750±1.120 a	6.451±0.426 a
Y60	0.059±0.001 b	10.490±1.042 a	5.776±0.475 a
Y120	0.040±0.004 c	7.945±1.231 a	5.262±0.331 a

浸提液浓度 Leachate concentrations/ (mg·mL^-1)	化感效应指数Response index				综合化感效应 Synthetical allelopathic effect
浸提液浓度 Leachate concentrations/ (mg·mL^-1)	发芽率 Germination rate	发芽势 Germination energy	发芽指数 Germination index	平均发芽时间 Mean germination time	综合化感效应 Synthetical allelopathic effect
5	0.06	0.21	0.11	0.14	0.13
10	-0.03	-0.05	-0.10	-0.10	-0.07
20	-0.09	-0.18	-0.21	-0.08	-0.14
40	-0.27	-0.50	-0.45	-0.20	-0.36
60	-0.45	-0.54	-0.56	-0.07	-0.41

处理 Treatments	化感效应指数Response index						综合化感效应 Synthetical allelopathic effect
处理 Treatments	叶重 Leaf biomass	根重 Root biomass	茎重 Stem biomass	总重 Total biomass	总叶面积 Total leaf area	平均相对生长速率 Relative growth rate	综合化感效应 Synthetical allelopathic effect
Y30	0.34	0.33	0.23	0.26	0.33	0.11	0.27
Y60	-0.12	0.22	-0.08	-0.06	-0.18	-0.13	-0.06
Y120	-0.66	-0.38	-0.5	-0.53	-0.72	-0.33	-0.52

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